This is usually the case most of the time with the exception of stablecoins of course.
From the perspective of investor like me back in the days, I usually sell my Bitcoin and altcoin concurrently whenever I get the earnings that I needed. I usually move these two holdings around whenever I need to, though I do not really trade actively until late 2018-2019.

Got more losses in alts than Bitcoin if you're going to ask me.